Table 2.

Distribution of Melanoma Characteristics by Diagnosis Period^*

Characteristic	1950-1954		1960-1964		1973-1977		1983-1987		1993-1997		2003-2007
	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Behavior
In situ	—		—		52	4.5	235	10.9	1,332	30.2	2,930	30.9
Invasive	229	100.0	463	100.0	1,092	95.5	1,917	89.1	3,084	69.8	4,072	69.1
Sex
Female	133	58.1	229	49.5	508	46.5	876	45.7	1,355	43.9	1,789	44.5
Male	96	41.9	234	50.5	584	53.5	1,041	54.3	1,729	56.1	2,283	55.5
Age at diagnosis, years
< 50	118	51.5	251	54.2	453	41.5	688	35.9	979	31.7	1,104	27.1
≥ 50	111	48.5	212	45.8	639	58.5	1,229	64.1	2,105	68.3	2,968	72.9
Anatomic site
C44.0-C44.4, head and neck	—		—		169	15.5	317	16.5	523	17.0	738	18.1
C44.5, skin of trunk	—		—		378	34.6	688	35.9	1,149	37.3	1,388	34.1
C44.6, skin of upper limb and shoulder	—		—		237	21.7	403	21.0	707	22.9	993	24.4
C44.7, skin of lower limb and hip	—		—		232	21.2	408	21.3	578	18.7	818	20.1
C44.8-C44.9, overlapping and skin, NOS	—		—		76	7.0	101	5.3	127	4.1	135	3.3
Breslow thickness, mm
≤ 1	—		—		—		—		1,870	60.6	2,722	66.8
1.01-2	—		—		—		—		377	12.2	493	12.1
2.01-4	—		—		—		—		223	7.2	258	6.3
> 4	—		—		—		—		108	3.5	153	3.8
No mass/tumor found	—		—		—		—		3	0.1	36	0.9
Unknown/not stated/microinvasion	—		—		—		—		503	16.3	410	10.1

Abbreviation: NOS, not otherwise specified.

^*For melanomas diagnosed in white Connecticut residents age 20 to 84 years. All characteristics except behavior refer to invasive melanoma only.